In Memory of.....What!?!?!?

Have you ever seen those "In Memory of (fill in the blank)" stickers on random cars out on the road? Those things drive me insane, for a couple reasons, not the least of which is that fact that I have serious issues for all things that (I deem) are stupid!! In my view when the words "In memory of" are part of some sort of memorial (obviously) it implies that something physical has been commissioned in the memory of a loved one, i.e. a headstone, a planted tree, a donation to charity or something, ANYTHING! When we see these stickers, are we to believe that the vehicle on which they are affixed was purchased in someone's memory? Could it be that they are saying "Ha! I bought this with the inheritance", or "My (so and so) died and all I got was this lousy car"? Or is it the sticker itself that has been commissioned in loving memory of whomever? Now I know my hatred for most vanity-type bumper stickers may be clouding my judgement on the matter (don't get me started on the stick figure family stickers), but if someone commissioned a sticker in my memory, I may have to rise from the ashes to haunt the hose bag who paid money for said sticker.